#include<stdio.h>
#include<string.h>
#include<ctype.h>

int main()
{
    char s[1000]="I love you very much.";
    char t[1000];
    int offset=3;
    int len=strlen(s),i;
    for(i=0;i<len;i++)
    {
        if(isalpha(s[i])&&islower(s[i]))
            t[i]=(s[i]-'a'+offset)%26+'a';
        else if (isalpha(s[i])&&isupper(s[i]))
            t[i]=(s[i]-'A'+offset)%26+'A';
        else
            t[i]=s[i];
    }
    t[len]=0;
    puts(t);
    return 0;
}
